AtmoSec vs Expel
AtmoSec vs Expel, compared side by side on 22 data points: what each one does, how big it is, what it has raised, the tech running each site, and what users report. We score both out of 100 on traction, team and visibility: AtmoSec is on 54/100 and Expel on 66/100.
Where each one leads
AtmoSec
- domain rating: 90/100 against 71/100
Expel
- our overall score: 66/100 against 54/100
- agent readiness: 49/100 against 32/100
- headcount: 478 against 3
- funding raised: $268M against $6.0M
- LinkedIn following: 30,675 against 1,719
At a glance
| Measure | AtmoSec | Expel |
|---|---|---|
| What it is | AtmoSec is a SaaS security venture that provides a platform to secure hyperconnected SaaS ecosystems. | Managed detection and response provider using AI and automation to enhance cybersecurity. |
| Category | Cybersecurity, Enterprise, SaaS Security, Cloud Security | Cybersecurity, Managed Detection and Response, Threat Detection, Incident Response |
| Sells toBusiness model | B2B | B2B |
| Offering | Software | Software |
| Founded | 2021 | 2016 |
| Headquarters | Tel Aviv, Israel | Herndon, United States |
| Status | Active | Active |
Size, funding and growth
| Measure | AtmoSec | Expel |
|---|---|---|
| Employees | 3 | 478 |
| Headcount growthLast 12 months | -46.6% | Not published |
| Total funding | $6.0M | $268M |
| Latest round | Seed | Series E |
| Valuation | Not published | $1.0B |
| LinkedIn followers | 1,719 | 30,675 |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | AtmoSec | Expel |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 54/100 | 66/100 |
| Traction | 40/100 | 60/100 |
| Team | 70/100 | 70/100 |
| Community | Not published | 15/100 |
| Search visibility | 35/100 | 22/100 |
| Quality | 58/100 | 78/100 |
| Agent readinessHow well an AI agent can read and act on the site | F (32/100) | D (49/100) |
| Domain ratingLink authority, 0-100 | 90/100 | 71/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | AtmoSec | Expel |
|---|---|---|
| Hosting | AWS | AWS |
| CDN | CloudFront | Not detected |
| CMS | WordPress | WordPress |
| Frameworks | Jquery, Bootstrap | Not detected |
| Analytics | Google Tag Manager | Microsoft Clarity |
| Support stack | Drift | Not detected |
| Open source | No | Yes |
AtmoSec vs Expel: common questions
Which is better, AtmoSec or Expel?
On our 0-100 score Expel rates higher (66/100 against 54/100). The score weights traction, team, visibility and profile completeness, so it reflects company strength rather than which product suits you. We compare the two on 22 data points above: read the rows that match what you are buying for.
How do AtmoSec and Expel compare on the numbers?
AtmoSec leads on domain rating (90/100 against 71/100). Expel leads on our overall score (66/100 against 54/100), agent readiness (49/100 against 32/100), headcount (478 against 3), funding raised ($268M against $6.0M), LinkedIn following (30,675 against 1,719).
Read the full AtmoSec review and pricing or the Expel review and pricing. You can also browse other AtmoSec alternatives we track.

